Security that lives inside Microsoft 365, not in front of it.
Quaragate is an API-first, post-delivery email security platform. It connects with a least-privilege app-only grant, watches mail after it lands, and remediates threats the gateway already let through, without ever sitting in your delivery path.
No new gateway. No rerouting. No MX change.
Mail flows to Microsoft 365 exactly as it does today. Quaragate connects over Microsoft Graph and Exchange Online with an app-only identity and works on mail that has already been delivered. Nothing about your mail routing changes.
Microsoft 365
Mail is delivered to Exchange Online as normal, through your existing MX.
App-only connection
A least-privilege Graph and Exchange Online grant reads and acts on mail. Revocable any time.
Quaragate AI
Continuous triage and remediation. Malicious mail is quarantined in place, with an audit record.
Mail never leaves Microsoft 365 to reach Quaragate, and Quaragate never sits between the sender and the inbox.
What the AI actually does
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Behavioral baselining
Learns each tenant's normal senders, relationships, and patterns instead of relying on a single global ruleset.
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Classification and scoring
Scores every delivered message against that baseline and against named attack patterns.
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Disposition
Decides what to do with each message: leave it, flag it, or quarantine it, with the reasoning recorded.
Post-delivery, and continuous
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Re-checks as signals change
A message judged clean at delivery is re-evaluated when new intelligence arrives. Verdicts are not frozen at the door.
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Automatic quarantine and clawback
When a verdict turns malicious, the message is pulled from the mailbox it already reached.
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Full audit trail
Every state change is written to an immutable audit record, so you can always answer what happened and why.
Coverage across the whole tenant
Inbound mail, internal mail, and messages that were already delivered, across every mailbox in the tenant. Not a sample, not a subset.
Strict per-tenant isolation
Each tenant's mail, verdicts, and settings are isolated. One customer's data is never visible to another, which matters as much for single organizations as it does for MSPs.
See Quaragate on your own tenant.
Connect a Microsoft 365 tenant in minutes with an app-only grant. No MX changes, no mail rerouting, no new gateway in the delivery path.
No MX changes · Deploys in minutes · Per-tenant isolation